PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-08:57:50
G07     335.2          59.2                5.1 +/-    0.27       5.8 +/-    0.27  0.050 / 0.080
G08     109.5          51.8                6.1 +/-    0.90       7.6 +/-    0.90  0.040 / 0.090
G09     193.6          75.6                5.4 +/-    0.70       5.5 +/-    0.70  0.050 / 0.060
G11     147.2          12.9                3.5 +/-    3.28       9.2 +/-    3.28  0.050 / 0.080
G23     153.9          40.6                5.5 +/-    0.48       7.9 +/-    0.48  0.030 / 0.030
G27     57.2           32.7                3.9 +/-    1.28       6.5 +/-    1.28  0.030 / 0.030
G28     234.3          22.0                5.8 +/-    3.04      12.2 +/-    3.04  0.030 / 0.040
G30     300.5          34.0                3.8 +/-    1.69       6.2 +/-    1.69  0.040 / 0.050